So far:
Florida - Muschamp fired
Buffalo - Jeff Quinn fired
Kansas - Charlie Weis fired
SMU - June Jones quit
Troy - Larry Blakeney retiring
Of those, Buffalo, Kansas and SMU hired interim coaches that are not expected to be retained after the season. BTW. Buffalo's interim coach is Alex Wood was an OC at WF under Jim Caldwell.
Of the Power 5 schools, Michigan is the only school that is certain to fire the current head coach. Coaching changes could occur at VT, Illinois, Indiana, Oregon State, S. Carolina, Iowa State either due to retirements or firings. Also, you never know if the NFL is going to try to steal a big name college coach like when the Eagles hired Chip Kelly (or even a lesser name like when the Bills hired Doug Marrone) two years ago. Next few weeks will be interesting.